As others have mentioned, one issue with trying to create a universal formula for 'ware is that not all attributes are created equal. Consider Agility vs Logic. Agility covers a pretty wide array of skills that are of good general use to EVERYONE - just about every runner out there could use stealth, or weapons usage, or gymnastics in a lot of cases. Logic on the other hand, while certainly tied to a plethora of skills, is mostly made of very specific niche ones. Most runners are doing just fine without Hardware or Automotive Repair, and even the more generalist skills that most characters could use a point in (like Computers) are just those - skills to put a point in. On the other hand, for characters that DO use Logic, it skyrockets to the most important attribute they have. So should they be priced the same?
What about Strength vs Agility? I don't think it's hard to argue that Agility is more useful then Strength for 90% of characters.
As for one previous mention regarding SINs, keep in mind there is a difference between broadcasting your SIN, showing your SIN, and having your SIN get scanned. In most street living situations, a level 1 SIN could get you by, and a rating 2 is neigh impenetrable; the guy at the Stuffer Shack isn't going to scan your SIN to make sure you are some evil SINless criminal trying to buy your soy burrito illegally, and the bartender is probably using a rating 1 scanner. You need rating 3 or 4 if you're going to try to legally enter extraterritorial grounds, go though checkpoints, that sorta thing. So if you're making Serious Sam the Shooting Man Troll with Uncouth and dastardly low charisma...chances are, you aren't trying to enter those places legally to begin with.
Now, of course, if you're in an extremely high security locale like NYC, that might change. But NYC is dreadful to run in as written anyways, so just don't do that.